from the GNU version of the Collaborative International Dictionary of English

adj. Free from constraint or obligation; not bound by duty, habit, etc.; -- with from or of.

adj. Not tight or close.

adj. Not dense, close, compact, or crowded.

adj. Not precise or exact; vague; indeterminate.

adj. Not strict in matters of morality; not rigid according to some standard of right.

adj. Unconnected; rambling.

adj. Lax; not costive; having lax bowels.

adj. Dissolute; unchaste.

adj. Containing or consisting of obscene or unchaste language.

n. Freedom from restraint.

n. A letting go; discharge.

v. To untie or unbind; to free from any fastening; to remove the shackles or fastenings of; to set free; to relieve.

v. To release from anything obligatory or burdensome; to disengage; hence, to absolve; to remit.

v. To relax; to loosen; to make less strict.

v. To solve; to interpret.

intransitive v. To set sail.

from The Century Dictionary and Cyclopedia

Not fast or confined; not fastened; unattached; free from restraint or obligation; not bound to another or together; without bonds, ties, or attachments; at liberty: as, loose sheets of a book; loose tresses of hair; loose change in one's pocket; to break loose; to be set loose; to cut loose from bad habits.

Not tight or close; without close union or adjustment; slightly or slackly joined: as, a loose knot; loose garments; a loose league or confederation.

Not dense or compact; having interstices or intervals; open or expanded: as, cloth of loose texture; a loose order of battle.

Not concise or condensed; wanting precision or connection of parts; diffuse; rambling: as, a loose style of writing; loose reasoning; a loose array of facts.

In Poland, he sought to convey lessons from those experiences to urge finance ministers from the 17-nation euro zone to speak with one voice and halt what he called "loose talk about dismantling the institutions of the euro."

Between dodging the bullets of the gang members who are infuriated by Alex's most recent courtroom victory and keeping a rendezvous with a charming restaurateur, a serial killer on the loose is the last thing she needs on her plate right now.